Thread: Tachometer
View Single Post
Old 06-18-2009, 06:43 PM
matt167 matt167 is offline
Motorized Bicycle Elite Member
Join Date: May 2009
Location: usa
Posts: 420
Default Re: Tachometer

Originally Posted by Cabinfever1977 View Post
12v cordless drill battery recharges in 1hour last for days $18 walmart.

should have specified more... car tachs use a 12v signal ( along with a 12v feed ) ( DC ) from the - side of the coil. it switches on and off and the tach 'counts' those pulses..couldn't use it on a High voltage A/C signal, like that of a magneto.
Reply With Quote